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Finding the Fourth Proportional to 1,064.75, 1,468.50 and 691.75

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Solution

The fourth proportional to 1,064.75, 1,468.50 and 691.75 is: 954.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,064.75 : 1,468.50 = 691.75 : x
  2. Step 2: Convert to fraction form
    1,064.75/1,468.50 = 691.75/x
  3. Step 3: Cross multiply
    1,064.75x = 1,468.50 × 691.75
  4. Step 4: Simplify right side
    1,064.75x = 1,015,834.88
  5. Step 5: Solve for x
    x = 1,015,834.88/1,064.75
  6. Step 6: Final answer
    x = 954.06

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Double scale
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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.